MP3393EF-LF-Z

LED-based lighting offers directional lighting and low power consumption over standard incandescent lighting. LED drivers provide a regulated DC current to an LED load, enabling LED modules to maintain a high level of efficiency during variations in line voltage, temperature or age. For use in some LED applications, such as automotive lighting, sunlight illumination, traffic signal lamps and streetlights, a high efficiency LED driver is required. And the MP3393EF-LF-Z is designed specifically for high efficiency LED driving applications.

The Application Field of MP3393EF-LF-Z

The MP3393EF-LF-Z is a high efficiency primary-side regulator, specifically designed for high-power white LED driving applications with minimal external components. It eliminates the requirements for a secondary-side control circuit, optocoupler and feedback circuitry, providing up to 92% efficiency for low off-time driver designs.The MP3393EF-LF-Z outputs constant constant current and is available in a fixed output current version of 400mA. This easy-to-use device is ideal for applications designed with single power stage without secondary control and optional external components, providing high efficiency, low EMI and low cost LED solutions.

The MP3393EF-LF-Z LED driver is most ideal for LED lighting applications with the following features:

• Automotive lighting
• Sunlight illumination
• Traffic signal lamps
• Street lamps

It is also suitable for applications with varying input supply voltages and low output current, such as decorative lighting, home appliances, and audio/video equipment.

The Working Principle of MP3393EF-LF-Z

The MP3393EF-LF-Z utilizes the Pulse Frequency Modulation (PFM) technique with very low off-time and constant output current. This enables the use of minimum external components and maximizes system efficiency. The MP3393EF-LF-Z has built-in protections, such as Under Voltage Lockout (UVLO), Output Over Voltage Protection (OVP) and Output Short Circuit Protection (SCP), to ensure stability in the system.

The MP3393EF-LF-Z uses a capacitor connected to the feedback pin (FB) to control the output current. Closed-loop feedback control ensures that the output current is constant and independent of variations in input voltage and temperature. The MP3393EF-LF-Z also has a built-in temperature sensor which can be used to limit the power dissipation and enhance the system reliability.

The MP3393EF-LF-Z can be programmed for high switching frequency operation (by default 200kHz) for noise reduction and higher efficiency. It also includes soft start feature to reduce the output inrush current and ease the LED lighting start. In addition, it also includes a built-in LED over temperature protection circuit to protect the LED from overheating.

Conclusion

The MP3393EF-LF-Z LED driver is an ideal power solution for LED lighting applications such as automotive lighting, sunlight illumination, traffic signal lamps and streetlights, providing high efficiency and reliability. It eliminates the need for a secondary-side control circuit, optocoupler and feedback circuitry, making it the most cost-effective and efficient solution for LED lighting applications.